Jon,
yes it is a different story as I had mentioned myself if you had
read far enough. If you did read far enough then you must just be looking
for something or someone to bitch at. The response was a flow of thoughts,
not a technical paper. I didn't have time to go back and edit it as I
remembered more details of the article I was recalling.
But the issue with the traces was to keep them 20H inside the plane
edge, verses traces closer to the plane edge. Not uncontrolled traces
radiating in free space. Could it be applied to Planes, I think not because
that would assume that you had noise or signal only on the one plane and we
have thoroughly discussed how that is not necessarily (dare I say "usually")
true.
Any comments on my comment that this kind of sounds like a misplaced rule
which started at conductors and now someone has stretched and misplaced it
to planes?
Brad Velander,
Lead PCB Designer,
Norsat International Inc.,
#300 - 4401 Still Creek Dr.,
Burnaby, B.C., V5C 6G9.
Tel. (604) 292-9089 direct
Fax (604) 292-9010
website www.norsat.com
> -----Original Message-----
> From: Jon Elson [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, July 12, 2001 2:15 PM
> To: Protel EDA Forum
> Subject: Re: [PEDA] perimeter stitched ground vias question
>
>
> AHHA! Now, that makes sense. Keeping the traces OVER a ground plane
> turns them into microstrip lines, rather than radiating
> cunductors in space.
> Most of the field is contained between the conductor and the ground
> plane. But, this is a totally different situation from
> keeping a power plane
> 'tucked inside' the ground plane.
>
> Jon
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